diff --git a/lab/data6.tsv b/lab/data6.tsv
new file mode 100644
index 0000000..2c53666
--- /dev/null
+++ b/lab/data6.tsv
@@ -0,0 +1,20 @@
+21.252	-555.640
+179.842	3840.141
+118.162	2274.989
+114.269	1146.575
+121.444	1840.589
+87.624	1663.894
+170.039	3504.537
+192.651	3708.239
+12.390	-358.240
+144.264	2444.162
+169.900	3348.941
+63.254	271.623
+72.439	900.423
+71.108	77.543
+179.476	3313.424
+169.084	2525.653
+99.073	734.413
+195.528	4067.410
+131.023	2182.147
+12.424	490.714